An ideal product classification in a continuous vacuum crystallizer would achieve the retention of all crystals within the crystallizer until they attained a desired size and then discharge them from the crystallizer.20 The size distribution of the product would be uniform, and all crystals would have the same value of D p' Such a process conforms to the other constraints for the mixed suspension-mixed product crystallizer except that the magma in the unit is classified by size and each crystal has the same retention or growth time. For such a process show that
